Back to school cookie cutters and name stamps

Back-to-school biscuits mostly end up in a lunchbox, and that is the constraint worth designing around. A shape with a thin protrusion survives the tray and then snaps in the bag. A pencil with a thick point holds; the same pencil with a finely tapered lead does not. Apples, buses, backpacks and single letters are all compact enough to travel.

Letters need one decision up front. A cutter reproduces the outline only, so the enclosed areas in A, B, D, O and 0 stay filled with dough. For a single large initial that is perfectly fine. For a whole name it is not: the letters would need to touch, and the joins become the thinnest sections in the model. Names and class numbers go on a cookie stamp instead, pressed into a plain round biscuit.

For printing, none of these shapes is demanding: PLA at 0.2 mm layers with three perimeters covers all of them. Scale to 80 or 90 mm rather than 60 if children are doing the cutting — a bigger cutter is easier to hold straight, and a straight press is what gives a clean edge. Bake one test biscuit before committing to a batch of thirty.